Press



Patented July 29, 1924.

warren srarss.

PATENT ser es. 1

LARN ED T. KIR'IMERLE AND DANIEL KIMMERLE, OF SAN FRANCISCO, CALIFORNIA.

PRESS.

Application filed May 5,

T 0 all whom it may concern:

Be it known that we, LARNED T. KIM- MERLE and DANIEL S. KIMMERLE, citizens of ing is a specification.

This invention relates to presses of the arbor type. 7

It is the principal object of the present invention to provide a generally improved press, having two independent feed mechanisms whereby the ram may be fed downwardly at different speeds and pressures. Preferably, we provide a pinion and toothed rack for fast speeds and a screw feed for slower speeds.

One form which the invention may assume is exemplified in the following description and illustrated by way of example in the accompanying drawings, in which:

F 1 is a side elevation of a press embodying the preferred form of the invention with parts broken away and in section to fully disclose certain structural features of the invention. I

Fig. 2 is a fragmentary View in plan section taken on line 2-2 of Fig. 1.

Fig. 3 is a fragmentary view in vertical section taken on line 33 of Fig. 1 disclosing the pinion and rack feed 'mechanism.

Referring more particularly to the accompanying drawings, we show an arbor type of press frame 10 formed with a bed 11 and a ram guide 12. A vertically disposed ram 14 is mounted in this guide for vertical movement toward and away from the bed 11. The ram is eXteriorly threaded for the reception of a screw feed mechanism indicated "at 15. This mechanism comprises a handwheel 16 having a fixed bushing 17 which is threaded on the ram. The upper end of the hub 18' of the handwheel is counterbored to snugly receive the shoulder 19 of the bushing 17 and a ball thrust bearing 20. This bearing is adapted to bear against a boss 21 formed as a continuation of the rain guide 12.

The exterior face of the hub 18'of the handwheel is formed with ratchet teeth 22. The outer face of these teeth are formed to. serve as a bearing surface for a collar 23. This collar cireumscribes the hub 18 and bears against an annular shoulder'24c formed 1923. Serial No. 636,982.

at the base of the teeth 22. The collar 23 is formed with a pocket 25, within which a pawl 26 is pivotally mounted. By means of a spring, the pawlis held in constant engagement with the teeth 22 and co-operates therewith to rotate the handwheel in one direction when the collar is oscillated. The operation may be accomplished by inserting the end of a hand bar (not shown) into the recess-27.

Due to the threaded engagement between the handwheel andthe ram, when the thrustbearing 20 is in engagement with the boss 21 on the frame, rotation of the handwheel in one direction will force the ram downwardlyrwith pressure. This operation may be accomplished by use of the ratchet mechanism mentioned;

V For light work, which requires only medium pressure, we provide a second feed mechanism for theram, which comprises a horizontal shaft 29 journalled in bearings 30 on thefframe. The inner end of this shaft is reduced and is fitted with a fixed pinion 31. This pinion is mounted between the bearings 30 and 30 and is held thereby 1 from endwiseor axial movement.

- The ram is formed with a longitudinal channel 32, within which a' toothed rack 33 is secured. The pinion 31 is in constant mesh with this rack. It is obvious from the drawings that turning movement ofthe shaft will, through the medium of thepinion and rack mentioned, impart vertical movement to the ram.

To maintain the ram in an elevated position, the bearing 30 is tapped for the reception of a set screw 34. A fibre washer'35 is interposed between the end of this 'set screw and the shaft. The set screw when tight ened; will force the washer into firm en gagement with the shaft and prevent rotation thereof and consequently maintain the ram in a set position.

The bed plate 11 is adapted for different classes of work and is formed with a' central opening 36, over which a work plate 37 may be laid when desired.

In operation of the device, should it be desired to lower the ram rapidly with medium pressure, the shaft 29 is rotated by means of a hand bar 40 loosely fitted in a socket 4:1. at the outboard end of the shaft. Rotation of the shaft will drive the pinion to impart downward movement to the ram through the rack 33. The ram may be raised by merely reversing the direction of rotation of the shaft 29.

Should it be desired to lower the ram with considerable pressure, the handwheel is backed up on the ram until it engages the boss on the frame. Continued rotation of the handwheel will then force the ram downwardly.

WVhen employing the handwheel feed mechanism and when the ram is lowered the .maximum amount, the handwheel is lowered on the ram. The ram may then be rapidly raised by employing the rack feed mechanism.

While we have shown the preferred form of our invention, it is understood that various changes in its construction may be made without departing from the spirit of the invention as claimed.

Having thus described our invention, what we claim and desire to secure by Letters Patent is:

l. A press comprising a frame having a guide formed at one end thereof, an exteriorly threaded ram mounted for movement in said guide toward and from the other end of the frame, a hand wheel threaded on the ram adapted to bear against the inner end of the guide whereby a turning movement of said hand wheel in one direc tion will force said ram toward the other end of the frame, a rack and pinion feed mechanism for the ram operable independently of said hand wheel, said hand wheel being movable with said ram when said rack and pinion feed mechanism is being operated.

2. A press comprising a frame, a ram guide formed at one end thereof, an exteriorly threaded ram mounted in said guide for movement toward and from the other end of 'said frame, a hand wheel threaded on said ram and adapted to bear against the inner end of said ram guide whereby turning movement of the hand wheel in one direction will force said ram toward the other end of the frame, the hub of said hand wheel being formed with ratchet teeth, a collar surrounding said hub, a spring-pressed pawl carried by said collar and engageable with said teeth whereby os cillating movement of said collar will rotate said hand wheel to feed the ram toward the end of the frame opposite the ram guide.

3. A press comprising a frame, a ram guide formed at one end thereof, an exteriorly threaded ram mounted in said guide for movement toward and from the other end of said frame, a hand wheel threaded on said ram and adapted to bear against the inner end of said ram guide whereby turning movement of the hand wheel in one direction will force said ram toward the other end of the frame, the hub of said hand wheel being formed with ratchet teeth, a collar surrounding said hub, a spring-pressed pawl carried by said collar and engageable with said teeth whereby oscillatin movement of said collar will rotate said hand wheel to feed the ram toward the end of the frame opposite the ram guide, arack formed longitudinally of said ram, an operating shaft carried by the frame, and a pinion fixed thereon and in constant mesh with said rack whereby said operating shaft may be rotated to operate the ram independently of the hand wheel.

4. A press comprising a frame having a bed plate, a guide on the frame, an exteriorly threaded ram mounted in the guide for movement toward and away from the bed plate, a screw feed mechanism threaded on the ram and adapted to co-operate with the frame to force ;the ram toward the bed plate, in a rack formed longitudinally on said ram, a pinion meshing with said rack and means for rotating the pinion.

5. A press comprising a frame having a bed plate, a guide on the frame, an exteriorly threaded ram mounted in the guide for movement toward and away from the bed plate, a screw feed mechanism threaded on the ram and adapted to co-operate with the frame to force the ram toward the bed plate, a pawl and ratchet mechanism for operating the feed mechanism, said ram having a toothed rack formed longitudinally thereof, bearings on the frame, a shaft carried thereby, a pinion fixed on the shaft in constant mesh with the rack whereby rotation of the shaft will impart movement to the ram through the said pinion and rack.

LARNED T. KIMMERLE. DANIEL S. KIMMERLE. 

